Error Message : PO creation

Dear All,

While creating Purchase Order in csae there is some error by the user say Material is non maintained in teh Plant or blocked for procurement in that Plant, system is showing single error message " Purchase Order Still containes fauly items" whereas earlier we used to get specific error message. There has been no settings related to messages done still we are facing this problem.

Please guide how we can configure specific message for any error/mistake done while creating teh Purchase Order.